There’s a couple of grits available. Go with the finer grit. The coarser stuff tends to clog new nozzles in my cabinet, although I acknowledge that some of the problem may be rust pieces that migrate to the suction hose.
Agree. Works great but you have to stick to the finer grit unless you have massive compressor capable of 30cfm+. I tried the medium grit and it would clog constantly. Needed a larger orifice nozzle but the next size up needed 30cfm